GSM /SMS communication or GPRS TCP/UDP connection Support 3-frequency GSM 900/1800/1900 MHZ or GSM850/900/1800/1900MHZ (Option)

Detailed Specificatons:

1. GSM /SMS communication or GPRS TCP/UDP connection2. Support 3-frequency GSM 900/1800/1900 MHZ or GSM850/900/1800/1900MHZ (Optional)3. High sensitivity,New technology and latest GPS SiRF-Star III chipset! 4. Excellent for fixing the position even at a weak signal status.5. Work well even in areas with limited sky view like urban canyons.6. Compact size, and smaller than one name card. Easy to hide7. Very Low power consumption8. Fast Signal Acquisition9. Support single location and continuous tracking10.Support location triggered by tracker11.Support location triggered  by authorized cell phone 12.Support alarm and remote monitor13.Support quick dialing buttons for 2 preset phone numbers 14.Support check location by SMS and Internet15.Monitors can track the person without interfering him16.Locate the locator holder by the mobile phone via SMS (short messaging system)17.SOS button send out exact location for immediate rescue/action18.Geo-fencing to restrict movement to a defined radius.19.No monthly service charges to be paid to the call center20.Optional color: black, silver21.Size:76 mm*46mm*25mm  Weight:85G22.Big packing (20PCS): Size: 55*33*37 cm N.W.: 12.5KG  G.W.: 13.5KG

GPS Tracker Support 3-frequency GSM 900/1800/1900 MHZ or GSM850/900/1800/1900MHZ (Optional)